Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays

Tree-level flavor-changing neutral currents (FCNC) are characteristic of models with extra vectorlike quarks. These new couplings can strongly modify the B/sup 0/ CP asymmetries without conflicting with low-energy constraints. In the light of low CP asymmetry in B to J/ psi K/sub S/, we discuss the...

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Detalles Bibliográficos
Autores principales: Barenboim, G, Botella, F J, Vives, O
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/516903
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author Barenboim, G
Botella, F J
Vives, O
author_facet Barenboim, G
Botella, F J
Vives, O
author_sort Barenboim, G
collection CERN
description Tree-level flavor-changing neutral currents (FCNC) are characteristic of models with extra vectorlike quarks. These new couplings can strongly modify the B/sup 0/ CP asymmetries without conflicting with low-energy constraints. In the light of low CP asymmetry in B to J/ psi K/sub S/, we discuss the implications of these contributions. We find that even these low values can be easily accommodated in these models. Furthermore, we show that the new data from B factories tend to favor an O(20) enhancement of the b to dll transition over the SM expectation. (25 refs).
id cern-516903
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
record_format invenio
spelling cern-5169032019-09-30T06:29:59Zhttp://cds.cern.ch/record/516903engBarenboim, GBotella, F JVives, OTree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decaysParticle Physics - PhenomenologyTree-level flavor-changing neutral currents (FCNC) are characteristic of models with extra vectorlike quarks. These new couplings can strongly modify the B/sup 0/ CP asymmetries without conflicting with low-energy constraints. In the light of low CP asymmetry in B to J/ psi K/sub S/, we discuss the implications of these contributions. We find that even these low values can be easily accommodated in these models. Furthermore, we show that the new data from B factories tend to favor an O(20) enhancement of the b to dll transition over the SM expectation. (25 refs).oai:cds.cern.ch:5169032001
spellingShingle Particle Physics - Phenomenology
Barenboim, G
Botella, F J
Vives, O
Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays
title Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays
title_full Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays
title_fullStr Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays
title_full_unstemmed Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays
title_short Tree-level flavor-changing neutral currents in the B system: From CP asymmetries to rare decays
title_sort tree-level flavor-changing neutral currents in the b system: from cp asymmetries to rare decays
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/516903
work_keys_str_mv AT barenboimg treelevelflavorchangingneutralcurrentsinthebsystemfromcpasymmetriestoraredecays
AT botellafj treelevelflavorchangingneutralcurrentsinthebsystemfromcpasymmetriestoraredecays
AT viveso treelevelflavorchangingneutralcurrentsinthebsystemfromcpasymmetriestoraredecays

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